Vapor-lamp.



No. 829,129. PATENTED AUG. 21, 1906.

' G. E. TREWHELLA.

VAPOR LAMP.

APPLICATION FILED 00T.20, 1905.

2 25' F3511. IP I 22 I3 /2 W is q 8 1 EU fl UNITED STATES PATENT OFFICE.

CHARLES E. TREWHELLA, OF NEW BRITAIN, CONNECTICUT, ASSIGNOR TO AMERICANSILVER COMPANY. OF BRISTOL. CONNECTICUT, A COR- PORATION.

VAPOR-LAMP.

Specification of Letters Patent.

Patented Aug. 21, 1906.

Application fil d October 20, 1905. Serial No. 283.693.

.HELLA, a citizen of the United States, residing at New Britain, in thecounty of Hart ford and State of Connecticut, have invented certain newand useful Improvements in Vapor-Lamps, of which the following is aspecification.

My invention relates to improvements in vapor-lamps; and the objects ofmy improvement are simple and inexpensive provision for venting the lampwith efficiency and convenience in operation of the lamp.

In the accompanying drawings,'Figure 1 is a central vertical section ona line through the axis of the shutter and burner operating shaft, theshutter being closed, the said shaft and its knob being shown inelevation. Fig. 2 is a detached and broken side elevation of the upperend of the lamp with the shutter open. Fig. 3 is a plan view of theburnercap. Fig. 4 is a horizontal section of the burner or wick-tube onthe line m to of Fig. 2. Fig. 5 is an enlarged side elevation of theburner and shutter with the burner-cap removed and the shutter opened.Fig. 6 is a vertical section of the upper end of the burner on the liney y of Fig. 2. Fig. 7 is a transverse section of a wick-tube andshutter, showing a modified form of wick-tube. Fig. 8 is a centralvertical section of the wick-tube cap on the line 2 z of Fig. 7, with aside elevation of the wick-tube.

A designates a font which may be of any ordinary construction andprovided with a central opening 7 in its top, through which theburner-tube or wick-tube 8 and the shutter or extinguisher 9 may extend.In the interior of the font A at the bottom I place a guide-tube orsocket 10, which may be in a skeleton form or have its sides perforated,so as to let the alcohol or other fluid into its interior. Some-of myimprovements are applicable to a fixed wick-tube or burner; but one ofthe improvements in this application relates to a movable burner orwick-tubethat is, a burner that is raised and lowered. The shutter 9 andwick-tube 8 are arranged to slide one upon the other, the wick-tubebeing within the shutter and fitted closely enough thereto to properlyguide the shutter. The lamp-font is provided with any or dinaryoperating-knob 11, shaft 12, and pinion 13 foroperating the shutter orthe shutter and wick-tube. The lower end of the wick-tube 8 rests withinthe socket or guidetube 10 at the bottom of the lamp, the said socketbeing slightly longer than the range of movement of the wick-tube, sothat the lower end of the wick-tube in use is always within the saidsocket or guide-tube. On one side of the shutter is a pinion slot oropening, one edge of the metal at the said slot being toothed to formthe rack 14, while the opposite edge 15 serves as a guide. A like slotis made 'in one side of the burner-tube to form a corresponding rack 16,Fig. 5, and guiding edge 17, Fig. 1. A bridge 18, Fig. 1, may be placedon the inner side of the wick-tube, directly opposite the pinion-slot,to prevent the wick 26 from coming in contact with the end of the pinion13. The pinion is long enough to pass through both pinion-slots andsimultaneously engage both racksthe rack 14 of the shutter and the rack16 of the burner while the guiding edges in the said pinionslots engagethe side of the pinion opposite each rack, and thus prevent the shutterand the burner from rotating on their axis, so as to disengage the rackfrom the pinion. The parts are so assembled with reference to themovements of the shutter and wick-tube that the shutter will be at itslowermost position when the wick-tube or burner is in its highestosition, as shown in Figs. 2 and 5, inwhich the shutter is open. Thenturning the pinion in the direction to close the shutter the shuttermoves upwardly, while the burner moves downwardly until the upper end ofthe shutter and flange 19 of the burner-cap 20 come together and closethe shutter, as shown in Fig. 1. It should benoted that thissimultaneous reverse movement of the shutter and burner is effected byplacing the respective racks on opposite sides of the pinion, as shownin Fig. 5.

The next part of my improvement relates to the burner-cap and vent. Iform the wicktube 8 witha reduced neck 21 at a point within the font andabove the filling-opening 22. In one or more sides of the wick-tubeabove this reduced portion I form the vent-groove 23 by indenting themetal, as shown. A little below the upper end of the tube 8 and insideof the same I place a diaphragm 24 to close the upper end of the saidtube on its interior. The cap 20, having a central vent or jet 25, isplaced on the upper end of the tube 8, and

jtral jet in the cap.

forations 27 in the ordinary manner of simi-' lar burners. By raisingthe burner and lowering the shutter from the position shown in Fig. 1 tothat shown in Fig. 2 the lamp (being properly filled) is in position folighting. Whenit becomes properly heated, it will burn through both rowsof openings in the burner and also sometimes burn at the cen- Ifdesired, the pinion may be operated until the lower rowof openings isclosed by the shutter to extinguish the flame at the said lower row. Bymoving far enough to bring the shutter and burner into the positionshown in Fig. 1 all the flame will be extinguished except that at thecentral jet in the cap. After a little while as the lamp cools off theflame at this jet will die out.

In Figs. 7 and S I have shown an equivalent for the grooved wick-tube inconnection The wick-tube 8 is of a with the cap 20. hexagonal form incross-section, so that when placed" in the round shutter 9 there is alongitudinal space between the shutter and each of the six sides of thetube, substantially the same as that formed by the groove 23 and shutter9. The wick-tube is surmounted by the same cap as before and alsoprovided with the same diaphragm, and at the upper end of the six sidesan opening 28 is formed to connect the outer side of the wick-tube withthe chamber under the cap. The operation is the same as that of theconstruction first described.

By means of the grooved or flattened sides of the wick-tube there isalways a ventingspace between the wick-tube and the shutter, and bymeans "of the vented cap having open ings leading to the said grooved orflattened sides any excess of gas will burn at the cen tral jet of thecap, and the font is effectually vented, even when the shutter isclosed. By the simultaneous movement of the shutter and burner the flameis extinguished by only a slight turn of the operating-knob.

I claim as my invention 1. In a vapor-lamp, the combination of a font,an operating-shaft and pinion mounted on the said font, a tubularshutter having a rack in engagement with the said pinion at one sidethereof, and a wick-tube arranged within the said shutter and having arack in engagement with the said pinion at its opposite side, allcombined and operatin to simultaneously lower the said wick-tu e andraise the said shutter.

2. In a vapor-lamp having a font and a tubular shutter, the combinationof a wick-tube fltted inside of the said shutter and having a reducedneck inside of the said font, with an imperforate diaphragm closinginteriorly the upper end of the, wick-tube, and a cap having a jetperforation and mounted on the upper end of the said wick-tube above thesaid diaphragm, the said wick-tube having a groove on its outer sideextending from the said reduced portion within the said font up to, andopening into, the space between the said diaphgagm and cap at the upperend of the wicktu e.

8. In a vapor-lamp having a font and a tubular shutter, the combinationof a Wick-tube an imperforate diaphragm closing interiorly the upper endof the saidwick-tube, a cap mounted on the upper end of the said wick- 5tube above the said diaphragm and having a jet perforation, and anopening leading from the font on the outer side of the wick-tube to thespace between the said cap and diaphragm.

CHARLES E. TREWVHELLA. WVitnesses:

J. R. HoLLEY. A. D. WILSON

